<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script>
      // 1.定义变量  变量类型  变量名  = 变量值；
      var score = 76;
      var name ="zhangsan";
      var zzz=2;
      //alert(num);
      // 2.条件控制
      if (score>60 && score<70){
        alert("60~70")
        }else if (score>70 && score<80){
        alert("70~80")
      }else{
        alert("other")
      }
      //sout
      console.log(score)
      /**
       *
       */
    </script>
</head>
<body>

</body>
</html>